Power-hammer



H. C. URBANER.

POWER HAMMER.

APPLICATION FILED MAY 19, 1919.

1,355,291. I Patented Oct. 12,1920.

2 SHEETSSHEET I.

H. C. URBANER.

POWER HAMMER.

APPLICATION FILED MAY 19, 1919.

' 2 SHEETSGSHEET 2.

/fi f a/ /Z m 7 51 mm who:

Patented 001;. 12,1920.

UNITED STATES PATENIVT OFFICE.

.HENRY CHARLES URBANER, OF 'NAPER-VILLE, ILLINOIS.

, POWER-HAMMER.

T 0 all whom itxmay concern.

Be it known that I, HENRY CHARLES LTRBA'NER, a citizen of the United States, residing at Nap'ervillef in the county of Dupage, State of Illinois, have invented a new and useful Power-Hammer; and I do here' by declare the following to be" a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to make and usethe same.

The invention relates to power hammers and has for its object to provide a hammer of this character which'is simple in construction, small and compact, thereby allowing the use of a power hammer in small establishments.

A further object of the invention is to provide apower hammer wherein the hammer head is reciprocated by means of a pitman rod, said pitman rod being actuated by a rotating wheel, whichactuation of the pitman rod causes thehammer head tov be moved in a vertical plane by means of-two cross heads'carried by the frame of the machine.

A further object is to provide the hammer head with-a spring actuated resilient means whereby said spring "will increase the percussive blows of the hammer head as the hammer head .reciprocates.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the'precise embodiment of the invention may be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawings Figure l is a view inside elevation of the power hammer. I

Fig. 2 is a. front elevation of the same,

:Fig 3 is a verticalsectional view taken on line 3310f Fig. 2.

Fig. 4 is a plan view of a rotatingtool carrying turret, which is used in conjunction with the hammer.

Fig. 5 is a sectional 5-5 of Fig. 4.

Fig.6 is a horizontal sectional view taken on line 6 6 of Fig. 5.

Referring to the drawings, the numeral 1 designates a frame which frame ,is preferably formed from angle iron as shown.

View taken on line V Specification of Letters Patent.

Application filed May 19, as. seriarn 298,024.

If desirable, however, this frame may be formed from a casting. The upper end of the frame 1 is provided with a bed plate 2 which bed plate 2 extends around and down the front face 3 of the frame and terminates preferably within the throat 4 of said frame. Securedto the bed plate 2 by means of bolts 5 areupstanding bracket arms 6 and rotatably mounted in said'bracket arms are shafts 7 and 8. A pulley 9 is secured by means of a pin 10 to the shaft 7, said pulley being adapted to receive a belt which may lead to any suitable source of power. One

side of the pulley 9 is provided with a conical depression 10" forming a clutch member, which clutch-member is adapted'to be cooperated with by the s'lidable clutch keeps the clutch member outofengagement with theconica'l-depression 10 of the pulley thereby allowingthe pulley-to rotate at all times without transmitting power to the shaft 8. A clutch actuating yoke 14 is adapted to slide the clutch member 11 on the shaft 8. This yoke 14 is secured on a shaft 15' which shaft 1 5 is carried by lugs 16, in which lugs the shaft 15 is rotatably mounted. One end of said shaft is provided with an arm 17, said arm being secured to the rookable shaft 15 and has its other end connected to a connecting rod 18, the lower end of said connecting rod being in turn connected to a foot lever 19, which foot lever is pivoted at '20 tothe frame of the ma-' chine. Itwill'be seen that by depressing the foot lever 19 theclutch member 11 will be forced into engagement with the conical depression 10, in the pulley 9 against the expansive action of the coilspring 13, thereby imparting a revoluble movement to the shaft 8. However, when the foot is removed from the foot lever 19 the expansive action of 26 carried by the front face of the frame. The lower end of thecross head is provided with a depression 27,"which depression is adapted to receive and have clamped therein by means of bolts28 a piston rod 29. I The piston rod 29 is in a vertical positlon and has its lower end disposed"withinv a cylinder 30' and secured: as at 32 to a coil spring said securing pointbeing at a pointintermediate the ends of said coil spring, however it has been foundpreferable to secure the lower end ofthe piston 29 to the coil spring, center thereof.

The cylinder 30 a brass lining and is preferably lined with the cylinder as a whole havingits upper end closed'by means of a 'which cross head is. vertically.

cap 35 which may securedthereto. Theobject of the brass lining in the cylinder isto prevent wearing of Y the spring when the machine is in operation and the cylinder is reciprocating rapidly on the endof the piston rod 29. The cylinder head 36, slidably mounted in cross head guides 37, said guides 37 being in vertical alinement with cross 30 is integrally secured to a cross head guides 26. This alinement of cross 7 heads 25and-36 insuring the vertical movement of the piston 29 and the cylinder 30 also the elimination of any wabbling of the parts. The lower end of the cross head 36 is provided with the dove-tail slot 38 in which slot various'types of metal forming tools 39 may beheld by means of set bolts 40.

It will be seen that as the cross heads are reciprocated thatthe cross head 36, which carries the metal forming tool will be moved I upwardly and downwardly and that the resilient connection between the lower end of the piston rod 29 and the coil spring within the clyinder, that the percussive blows of the metal forming tool may be increased or diforming tool need not son that varlations of this character are minished in force according to the speed of rotation ofthe pulley 9. It will also be seen that as the metal that isbeing worked-cools,

that the length of the stroke of the metal be varied, for the reataken up in the coiled spring.

The tool carrying turret comprises a base 41- which base has an upwardly extending projection 42' on which the object to be a5 is a shaft, which shaft formed by the, power hammer is adapted to be placed; 1 The base 41 is provided with a chamber 43, and rotatably mounted in a vertical position is a bearing 44 of saidbase, and 45 has keyed as at v 46 thereeto arevoluble tool turret47, which tool turret comprises arms 48 having tool holding means .49 at the endsthereof. The turret 47 .is adapted to be rotated byhand and various tools of various shapes which are carried in thetool holding ends 49 of the arms 46, may bebrought into registration at a point below the' ing the rotation of be threaded or otherwise 1 name to this specification'inthe with the article to be formed which article is disposed upon the upward projection 42 as clearly shown in Fig.1 of the drawings. Slidably mounted on 45 is aclutch cone 51, the upper end of said a key 50, of the shaft clutch cone being adapted to cooperate with the conical-depression 52 of the upper end of the chamber, 43 of ,the base 41.

shaft 45 and disposed between said collar and the lower surface of the clutch cone 51 is a coil spring, which coil spring normally keepsthe clutch cone51 in engagement with A A collar 52 is pinned'as at 53 to the lower end of the the conical depression52, thereby prevent- V the shaft and the turret carried thereby. iAclutch cone operating yoke 55 is in engagement with said clutch cone and is provided with a downwardly extending arm 56, which arm 56 is pivoted at 57 to the foot operating lever 58, said foot operating lever 58 being in turn pivoted at 59 to a lug carried by the base .41. It will be seen that by imparting a downward movement to the lever 58, that the yoke be forced downwardly, which downward forcing of the yoke 54 will pull the clutch,

52 will cone 51 out of engagement withthe conical depression 52, thereby allowingv the turret carried by the shaft 45 to be easily rotated by the hand of the operator until the proper toolis in position for use, when the'proper tool is inposition for use the pressure is relieved from the foot lever 58,, thereby allowing the co l spring 54 to force thecone 51 upwardly into engagementwith the conical depression carrying turret 47 in any position to which it may have been moved. 7 V. y The invention having been set forth what is claimed as new and useful is T A power hammer comprising a frame, a rotatable shaft mounted in saidjfr'ame, said 52' which will maintain the ,tool a rotatableshaft having a fly wheel s ecured to 7 head, thelower end of cally disposedchamber of a vertically guided hammer member, so that the hammer memr her is resiliently supported during areciprocation of the rod and during ahammering operation. V In testimony. whereof I have signedmy presence of two subscribing witnesses. o

HENRY CHARLES URBANER. I

Witnesses: V r H RBERT J. MATTER,

FRED 'L. HorrMnn. 

